Barack Obama's inauguration reminded the world that America is - in theory - a revolutionary society, founded on the promise of freedom and equality, inscribed in marble, enshrined in law.
In the frozen air of Washington, the inscriptions on the Jefferson or Lincoln memorials for once found expression in the grinning faces that had crammed into the Mall, the words that seeped from the loudspeakers and the very identity of the man at the centre of it all.
It was also a reminder of how often that promise had failed to live up to itself. Distributed by Tubemogul.